I don't know much about Whipple, but I'm also leery of the big splash hire guys. Either they work out and get stolen away as a HC somewhere, or they colossally fail (see: Diaco).
In my mind, what's really needed here is some sound, fundamental football. Frost already has enough flash and sexiness in his playbook. We don't need more pizazz; we need some basic skill building. Whipple might be that consistency.
Put it in terms of cars - Frost already has a stable of Corvette and Camaro-style plays, but for Chevy to succeed financially, you need to sell a crap load of Tahoes, Silverados and Malibus. That's the bread-and-butter stuff we've been lacking.